A Novel Common Path Interferometric Technique for Vibration Measurement Based on Two Fiber-Optic Couplers

[摘要]：A novel common path demodulation technique for low-coherence fiber-optic sensors for vibration measurement based on two serially connected fused silica fiber-optic directional couplers is presented. A 2 x 2 coupler is used in the sensor arm and a 3 x 3 co

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